@steipete/summarize is Vulnerable to Disk Exhaustion via Crafted Media Responses

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS 4.0

5.3 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N · score source

EPSS

• CVE-2026-53781: 0.32% estimated exploitation activity in the next 30 days; percentile 25.54 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summarize before 0.17.0 contains a resource exhaustion vulnerability that allows remote attackers to cause disk exhaustion by serving media responses that bypass the enforced size limit through missing or misreported Content-Length headers, chunked transfer encoding, or failed HEAD requests. Attackers who control a podcast feed or media URL can stream an unbounded response to local storage via the temp-file download path, exhausting disk or system resources on the host running the CLI.

Published by the source

11 Jun 2026, 21:31 UTC

Last modified by the source

27 Jul 2026, 16:26 UTC

Source last checked

26 Oct 2026, 12:58 UTC

1. Revision 3 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-q9xm-f36c-xm3q

2. Revision 2 · amended · 25 Oct 2026

   Reviewed OSV alias/range/CVSS4 correction; package source scopes and original publication preserved. No customer finding resolved.

3. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-q9xm-f36c-xm3q

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# Patch Next advisory brief: CVE-2026-53781

Advisory: @steipete/summarize is Vulnerable to Disk Exhaustion via Crafted Media Responses
IDs: CVE-2026-53781, GHSA-q9xm-f36c-xm3q
Record: https://patchnext.com/advisories/cve-2026-53781 (revision 3, source checked 26 Oct 2026, 12:58 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 5.3)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: @steipete/summarize-core 0.17.0. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm @steipete/summarize-core: affected < 0.17.0; fixed in 0.17.0

## Suggested inspection (read-only)
- `npm ls @steipete/summarize-core --all`: lists every installed copy and version, including transitive ones. Run in the project root after `npm ci`.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on @steipete/summarize-core.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-q9xm-f36c-xm3q (OSV record GHSA-q9xm-f36c-xm3q lists affected ranges: npm @steipete/summarize-core >=0 <0.17.0 (fixed))
- Verified: https://github.com/advisories/GHSA-q9xm-f36c-xm3q (GitHub-reviewed advisory GHSA-q9xm-f36c-xm3q lists affected ranges: npm @steipete/summarize-core >=0 <0.17.0)

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